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Pre-magnetization for enhancing the iron-catalyzed activation of peroxymonosulfate via accelerating the corrosion of Fe0.
Water Sci Technol. 2019 Apr; 79(7):1287-1296.WS

Abstract

Our findings proved that micron-scale zero-valent iron (mZVI) particles with pre-magnetization combined with peroxymonosulfate (PMS) can markedly enhance the removal of acid orange 7 (AO7). Investigation into the mechanism showed that PMS accelerated the corrosion of ZVI to release Fe2+ under acidic conditions, and the in-situ generated Fe2+ further activated PMS to produce SO4•- and •OH, resulting in AO7 removal. Further, the Lorentz force strengthened the convection in the solution and the field gradient force tended to move Fe2+ from a higher to a lower field gradient at the pre-magnetized ZVI (Pre-ZVI) particle surfaces, thus indicating that pre-magnetization promoted the corrosion of ZVI to release Fe2+, which resulted in the enhancement of PMS activation. Nano-scale ZVI (nZVI) was more effective than mZVI in activating PMS to degrade AO7, but the pre-magnetization effect on mZVI was better than on nZVI. AO7 removal increased with higher ZVI and PMS dosage, lower AO7 concentration, and acidic conditions (pH = 2, 3). This study helps to understand the reactive radicals-based oxidation process with application of pre-magnetized ZVI in activating PMS.

Authors+Show Affiliations

College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.College of Architecture & Environment, Sichuan University, Chengdu 610065, China E-mail: xyl_scu@126.com.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31123228

Citation

Liu, Yunxin, et al. "Pre-magnetization for Enhancing the Iron-catalyzed Activation of Peroxymonosulfate Via Accelerating the Corrosion of Fe0." Water Science and Technology : a Journal of the International Association On Water Pollution Research, vol. 79, no. 7, 2019, pp. 1287-1296.
Liu Y, Zhou P, Huo X, et al. Pre-magnetization for enhancing the iron-catalyzed activation of peroxymonosulfate via accelerating the corrosion of Fe0. Water Sci Technol. 2019;79(7):1287-1296.
Liu, Y., Zhou, P., Huo, X., Liu, Y., Cheng, X., & Zhang, Y. (2019). Pre-magnetization for enhancing the iron-catalyzed activation of peroxymonosulfate via accelerating the corrosion of Fe0. Water Science and Technology : a Journal of the International Association On Water Pollution Research, 79(7), 1287-1296. https://doi.org/10.2166/wst.2019.122
Liu Y, et al. Pre-magnetization for Enhancing the Iron-catalyzed Activation of Peroxymonosulfate Via Accelerating the Corrosion of Fe0. Water Sci Technol. 2019;79(7):1287-1296. PubMed PMID: 31123228.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Pre-magnetization for enhancing the iron-catalyzed activation of peroxymonosulfate via accelerating the corrosion of Fe0. AU - Liu,Yunxin, AU - Zhou,Peng, AU - Huo,Xiaowei, AU - Liu,Yang, AU - Cheng,Xin, AU - Zhang,Yongli, PY - 2019/5/25/entrez PY - 2019/5/28/pubmed PY - 2019/6/14/medline SP - 1287 EP - 1296 JF - Water science and technology : a journal of the International Association on Water Pollution Research JO - Water Sci Technol VL - 79 IS - 7 N2 - Our findings proved that micron-scale zero-valent iron (mZVI) particles with pre-magnetization combined with peroxymonosulfate (PMS) can markedly enhance the removal of acid orange 7 (AO7). Investigation into the mechanism showed that PMS accelerated the corrosion of ZVI to release Fe2+ under acidic conditions, and the in-situ generated Fe2+ further activated PMS to produce SO4•- and •OH, resulting in AO7 removal. Further, the Lorentz force strengthened the convection in the solution and the field gradient force tended to move Fe2+ from a higher to a lower field gradient at the pre-magnetized ZVI (Pre-ZVI) particle surfaces, thus indicating that pre-magnetization promoted the corrosion of ZVI to release Fe2+, which resulted in the enhancement of PMS activation. Nano-scale ZVI (nZVI) was more effective than mZVI in activating PMS to degrade AO7, but the pre-magnetization effect on mZVI was better than on nZVI. AO7 removal increased with higher ZVI and PMS dosage, lower AO7 concentration, and acidic conditions (pH = 2, 3). This study helps to understand the reactive radicals-based oxidation process with application of pre-magnetized ZVI in activating PMS. SN - 0273-1223 UR - https://www.unboundmedicine.com/medline/citation/31123228/Pre_magnetization_for_enhancing_the_iron_catalyzed_activation_of_peroxymonosulfate_via_accelerating_the_corrosion_of_Fe0_ L2 - https://iwaponline.com/wst/article-lookup/doi/10.2166/wst.2019.122 DB - PRIME DP - Unbound Medicine ER -